My husband is a gadget hound. Therefore we have dozens of batteries. They are EVERYWHERE. Regular alkaline batteries. Rechargeable batteries. Lithium ion batteries. D cell batteries, C batteries, AA batteries, AAA batteries.
9 volt batteries.
Camera batteries, watch batteries. Car batteries.
You name it. We most likely have it. To include DEAD batteries.
I am not sure why MacGyver keeps dead batteries around. He says he will use them. Someday. Somewhere.
I've yet to see it happen. Do I throw them away? You betcha. But only when I know they are dead. Otherwise the guilt is just too much for me to bear.